The increase could put upward pressure on inflation.
The energy regulator has given Eskom the go ahead to adjust rates above the 8% already granted.
Public Enterprise Minister said he would not apologise or retract his remarks on cadre deployment.
Electricity regulator Nersa says some municipalities hike electricity prices without its approval.
Eskom remains mum on whether it will appeal Nersa’s decision to cut its tariff hike proposal by half.
Nersa will announce its decision on Eskom’s proposed 16 percent tariff hike on Thursday.